Products

DUWAI High-Performance Mica Board for Electrical Insulation

Mica boards are made by bonding mica paper with silicone adhesive, followed by heating and pressing. The mica content is approximately 90%, with 10% silicone adhesive.

1. Overview of Mica Board

Mica boards are made by bonding mica paper with silicone adhesive, followed by heating and pressing. The mica content is approximately 90%, with 10% silicone adhesive.

2. Product Characteristics of Mica Board

  1. HP-5 Rigid White Mica Board: This product is silver-white in color, with a temperature resistance rating of 500℃ for continuous use and 850℃ for intermittent use.
  2. HP-8 Rigid Gold Mica Board: This product is gold in color, with a temperature resistance rating of 850℃ for continuous use and 1050℃ for intermittent use.
  3. Excellent High-Temperature Insulation: The mica board can withstand temperatures up to 1000℃, offering good value for high-temperature insulation materials.
  4. Outstanding Electrical Insulation: The standard product has a dielectric breakdown voltage of up to 20KV/mm.
  5. Superior Flexural Strength and Workability: The product has high flexural strength and excellent toughness, allowing it to be punched and processed into various shapes without delamination.
  6. Excellent Environmental Performance: The product is asbestos-free, emits little smoke, and produces minimal odor, or even no smoke or odor, when heated.
  7. HP-5 Rigid Mica Board: This is a high-strength board material that retains its original properties even under high-temperature conditions.

3. Applications of Mica Board

  1. Household Appliances: Used in electric irons, hair dryers, toasters, coffee makers, microwave ovens, and electric heaters.
  2. Metallurgy and Chemical Industry: Used in power frequency furnaces, intermediate frequency furnaces, electric arc furnaces, and injection molding machines in the metallurgy industry.

4. Technical Specifications of Mica Board

Serial Number Index Item Unit R-5660-T1 R-5660-T3 Test Procedure
1 Mica Paper   白云母 金云母  
2 Mica Content % ca.88 ca.88 IEC 371-2
3 Adhesive Content % ca.12 ca.12 IEC 371-2
4 Density g/cm2 2.35 2.35 IEC 371-2
5 Temperature Grade        
  Under Continuous Use Conditions 500 700  
  Under Intermittent Use Conditions 800 1000  
6 Water Absorption Rate 24H / 23°C % <1 <2 GB/T5019
7 Electrical Strength at 20°C KV/mm >20 >20 IEC 243
8 Insulation Resistance at 23°C Ω .cm 1017 1017 IEC93
  Insulation Resistance at 500°C Ω .cm 1012 1012 IEC93
9 Fire Resistance Rating   94V0 94V0 UL94

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